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P = m× g
SOLUCIONS 7
EIX X
Px = P × sin α
P = 100 × 9,8
Px = 980 × sin 70 º
P = 980 N
Px = 920,89 N
EIX Y
Py = P × cos α
Py = 980 × cos 70 º
Py = 335,17 N
Py = N = 335,17 N
Ffreg = N × µ
Ffreg = 335,17 × 0,2
Ffreg = 67,03 N
∑F = m×a
920,89 − 67,03 = 100 × a
a = (920,89 − 67,03) ÷ 100
a = 8,5m / s
SOLUCIONS 7.pdf (PDF, 133.39 KB)
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